| 释义 |
‖ rochetta Obs.
[ad. It. rocchetta.]
= polverine. Also attrib.
1662Merrett tr. Neri's Art of Glass i, Polverine, or Rochetta, which comes from the Levant and Syria, is the ashes of a certain herb growing there in abundance. Ibid. xxii, For the said tubes, they take half Crystal Fritt, and half Rochetta Fritt. 1748Phil. Trans. XLV. 563 There are some other Plants that are known to make a kind of Pot-ash, commonly called Rochetta, which is said to be even preferable to the Barrilha, especially for making Glass. 1765Ibid. LV. 21 With metal that hath much salt, as crystal and rochetta have, you cannot make a fair green. 1799G. Smith Laboratory I. 174 Take of calcined lead 15 pounds; of rochetta, or pulverized crystal frit 12 pounds. |